Construction of efficient dual activating ratiometric YVO₄:Nd³⁺/Eu³⁺ nanothermometers using co-doped and mixed phosphors

Abstract

Co-doped and mixed nanoparticles were used for the construction of highly sensitive dual activating ratiometric luminescent thermometers and their performances were compared.

Ratiometric Luminescent Thermometry with Excellent Sensitivity over a Broad Temperature Range Utilizing Thermally‐Assisted and Multiphoton Upconversion in Triply‐Doped La2O3:Yb3+/Er3+/Nd3+

“…For example, Dramićanin and coworkers recently presented results based on the ratio of emission between Mn 4+ and Ho 3+ in separate microcrystalline hosts (Mg 2 TiO 4 and Y 2 O 3 , respectively) to yield a constant S r of 4.6% K −1 between 300 and 370 K. [ 13 ] Recent work using emissions from the different activators in a mixture of nanoparticles singly‐doped with Nd 3+ or Eu 3+ also allowed a constant S r between 300 and 480 K, but at a value of less than 1.0% K −1 . [ 14 ] Expanding the possibilities beyond simple mixtures, dual‐phase glass ceramics have been developed that exploit the different thermal quenching of Eu 2+ and Cr 3+ ; this approach led to S r decreasing only as 1/ T , but S r in the measured range of in the range of 300–550 K was under 1% (calculated from the FIR fits presented in the paper). [ 10 ] Also, dual layer‐thin films deposited by atomic layer deposition were very recently reported.…”

YVO4 Nanoparticles Doped with Eu3+ and Nd3+ for Optical Nanothermometry

“…Our earlier paper was focused on the special case of such a comparison: co-doped (YVO 4 :Eu 3+ 6 atom %, Nd 3+ 0.12 atom %) and the binary mixture (YVO 4 :Eu 3+ 6 atom % + YVO 4 :Nd 3+ 0.12 atom %) of nanoparticles (NPs). 36 The next logical step is a study of the doping concentration effect on co-doped and mixed dispersed systems as the change of doping concentration should affect them differently. We assume that different distances between REI in co-doped and mixed nanoparticles would significantly influence the energy transfer efficiency and, as a result, the thermometric behavior.…”

Eu3+-doped ratiometric optical thermometers: Experiment and Judd-Ofelt modelling

“…Temperature is one of the most frequently measured physical parameters as it affects almost all aspects of our lives. An accurate temperature measurement is necessary for the reliable characterization and control of processes in various fields from biology and medicine to industrial production [1][2][3]. Direct determining of temperature is impossible, but it can be measured via control of various characteristics of bodies such as volume, pressure, conductivity, etc.…”